This document outlines Umair Najeeb Mughal's research on semi-active control of magnetorheological dampers for structures. It introduces the motivation to develop earthquake resilient structures and the open problems of actuator dynamics and closed-loop stability. The document then provides an overview of relevant background areas, including smart materials, non-Newtonian fluids, structural control techniques, magnetorheological damper models, and control methods. Mughal's current status and future goals are also mentioned.
This presentation is made to explain the best port locations on various 2D geometries to measure Angle of Attack as a function of Pressure Differential
This presentation contains,
i. Basics of Control Systems,
ii. Wind Turbine Controls
iii. Basics about Wind Farm and Control
iv. Wind Turbine Gearbox
v. Wind Turbine Generator
vi. Grids
This presentation is made to explain the best port locations on various 2D geometries to measure Angle of Attack as a function of Pressure Differential
This presentation contains,
i. Basics of Control Systems,
ii. Wind Turbine Controls
iii. Basics about Wind Farm and Control
iv. Wind Turbine Gearbox
v. Wind Turbine Generator
vi. Grids
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
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To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
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AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
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Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
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From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
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The six step guide to practical project management
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We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
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2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
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Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
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It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
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Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
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If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Semi active control of magnetorheological materials, data collected and presented by umair n. mughal
1. Semi Active Control of
Magnetorheological Damper for
Structures
Umair Najeeb Mughal
Supervisors:
Prof. Robert Gri˜o
n´
Prof. Fay¸al Ikhouane
c
Institute of Industrial and Control Engineering
Universitat Politecnica De Catalunya, BarcelonaTECH,
Barcelona, Spain 08034
umair.mughal@upc.edu
July 15, 2011
2. Outline Introduction State of the Art My Present Status Future Goals/Milestones
1 Introduction
2 State of the Art
3 My Present Status
4 Future Goals/Milestones
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 2 / 40
3. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Outline
1 Introduction
Motivation and Objective
2 State of the Art
3 My Present Status
4 Future Goals/Milestones
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 3 / 40
4. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Motivation and Objective
Introduction
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 4 / 40
5. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Motivation and Objective
Introduction
Motivation
Earthquake Resilient Structures
Life Safety
Inventory Safety
Open Problems
Actuator Dynamics
Closed Loop Stability
Objective
Nonlinear Control Law
Mathematical Proof
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 4 / 40
6. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Outline
1 Introduction
2 State of the Art
Smart Materials
Smart Materials
Magnetorheological Materials
Non Newtonian
Classifications of Fluids
Mathematical Models
Structural Control
MR Damper Models and Control Techniques
MR Damper Models
MR Damper Semi Active Control Techniques
3 My Present Status
4 Future Goals/Milestones
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 5 / 40
7. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Smart Materials
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 6 / 40
8. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Smart Materials
Shape Memory Alloys
Piezoelectric Materials
Magnetostrictive Materials
Magnetorheological Materials
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 6 / 40
9. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Magnetorheological Materials
What is it and how does it work?
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 7 / 40
10. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Magnetorheological Materials
What is it and how does it work?
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 7 / 40
11. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Magnetorheological Materials
Various Modes
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 8 / 40
12. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Smart Materials
Magnetorheological Materials
Various Modes
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 8 / 40
13. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Classifications of Fluids
Response to normal stress
Compressible (typically gases)
Incompressible (typically liquids)
Response to shear stress
·
Newtonion τyx = µγ yx
Non Newtonian ·
γ yx = f (τyx )
Time Independent Fluids
Time Dependent Fluids
or
Viscoelastic Fluids ·
τyx = f1 (γ yx )
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 9 / 40
14. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids Behavior
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 10 / 40
15. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids Behavior
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 10 / 40
16. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Shear Thinning Fluids
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 11 / 40
17. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Shear Thinning Fluids
Power Law Cross Viscosity Model
τyx ·
µ − µ∞ 1
µ= = m(γ yx )n−1 =
·
γ yx · n.
µ0 − µ∞ 1 + k(γ yx )
Carreau Viscosity Model Ellis Fluid Model
n−1
µ − µ∞ · 2 µ0
= 1 + (λγ yx )2 µ= α−1
µ0 − µ∞ τyx
1+ τ1
2
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 11 / 40
18. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Viscoplastic
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 12 / 40
19. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Viscoplastic
Bingham Plastic
·
B
τyx = τ0 + µB (γ yx ) for B
|τyx | > τ0 ,
·
γ yx = 0 for B
|τyx | < τ0 .
Hurshchel Bulkley Fluid
·
τyx = τ0 + m(γ yx )n
H for B
|τyx | > τ0 ,
·
γ yx = 0 for B
|τyx | < τ0 .
Casson Fluid Model
1
1 1 · 2
(|τyx |) 2 = C
τ0 2
+ µC γ yx for C
|τyx | > τ0 ,
·
γ yx = 0 for C
|τyx | < τ0 .
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 12 / 40
20. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Shear Thickening
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 13 / 40
21. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Independent Fluids
Shear Thickening
Power Law
τyx ·
µ= · = m(γ yx )n−1
γ yx
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 13 / 40
22. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Dependent Fluids Behavior
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 14 / 40
23. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Dependent Fluids Behavior
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 14 / 40
24. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Dependent Fluids
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 15 / 40
25. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Time Dependent Fluids
Thixotropy
Houska Model
· n
τyx = (τy 0 + τy 1 ) + (m0 + ξm1 ) γ yx ,
· ε
dξ
dt = a(1 − ξ) − bξ γ yx .
Rheopexy or Negative Thixotropy
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 15 / 40
26. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Non Newtonian Fluid Models
Viscoelastic
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 16 / 40
27. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Non Newtonian
Non Newtonian Fluid Models
Viscoelastic
Maxwell Model
· ·
τ + λτ = µγ
Voigt Model
·
τ = Gγ + µ γ
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 16 / 40
28. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Structural Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 17 / 40
29. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Structural Control
I Base Isolation
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 17 / 40
30. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Structural Control
I Base Isolation
II Structural Control
(i) Passive Control,
(ii) Active Control,
(iii) Hybrid Control,
(iv) Semi Active Control.
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 17 / 40
31. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Passive Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 18 / 40
32. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Passive Control
a Metallic yield Damping Control,
b Friction Damping Control,
c Viscoelastic Damping Control,
d Viscous Fluid Damping Control,
e Tuned mass dampers (TMD) Control.
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 18 / 40
33. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Active Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 19 / 40
34. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Active Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 19 / 40
35. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Hybrid Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 20 / 40
36. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Hybrid Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 20 / 40
37. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Semi Active Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 21 / 40
38. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Semi Active Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 21 / 40
39. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Structural Control
Semi Active Control
a Variable orifice viscous damper,
b Variable friction damper,
c Variable stiffness damper,
d Controllable fluid damper.
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 21 / 40
40. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 22 / 40
41. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bingham Model
Bouc Wen Model
Hyperbolic Tangent Model
Dahl Friction Model
Others
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 22 / 40
42. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models Non Parametric Models
Bingham Model Neural Network
Bouc Wen Model Fuzzy Logic
Hyperbolic Tangent Model Others
Dahl Friction Model
Others
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 22 / 40
43. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bingham Model
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 23 / 40
44. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bingham Model
Basic Bingham Model
· ·
fmr = fc sgn x + c0 x + f0
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 23 / 40
45. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bingham Model
Basic Bingham Model
· ·
fmr = fc sgn x + c0 x + f0
Extended Bingham Model
· ·
c0 x 1 + fc sgn x1 + f0 = k2 (x3 − x2 ) + f0 |F | > fc ,
fmr = ·
k1 (x2 − x1 ) + c1 x 2 + f0 = k2 (x3 − x2 ) + f0 |F | ≤ fc .
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 23 / 40
46. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bouc-Wen Model
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 24 / 40
47. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bouc-Wen Model
Basic Bouc-Wen Model
·
fmr = c0 x +k0 (x − x0 ) + αz,
· · · ·
z = −ϕ x z|z|n−1 − β x |z|n + κ x .
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 24 / 40
48. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Bouc-Wen Model
Basic Bouc-Wen Model
·
fmr = c0 x +k0 (x − x0 ) + αz,
· · · ·
z = −ϕ x z|z|n−1 − β x |z|n + κ x .
Modified Bouc-Wen Model
·
fmr = c1 y +k1 (x − x0 )
· ·
1
y = c +c αz + c0 x +k0 (x − y )
0 1
· · · · ·
z = −ϕ x − y z|z|n−1 − β|z|n + κ x − y
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 24 / 40
49. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Hyperbolic Tangent Model
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 25 / 40
50. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Hyperbolic Tangent Model
Hyperbolic Tangent Model by Ghao
· ·
x
x 0 = Ξ1 x0 + Ξ2 x + Ξ3 f0 tanh V0r
T T
∧ −k1 k1
f mr = x0 + x,
−c1 c1
0 1
Ξ1 = ,
− k0m0 1 − c0m0 1
+k +c
0 0
Ξ2 = k c ,
− m10 − m10
0
Ξ3 = 1 .
− m0
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 25 / 40
51. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Hyperbolic Tangent Model
Hyperbolic Tangent Model by Ghao
· ·
x
x 0 = Ξ1 x0 + Ξ2 x + Ξ3 f0 tanh V0r
T T
∧ −k1 k1
f mr = x0 + x,
−c1 c1
0 1
Ξ1 = ,
− k0m0 1 − c0m0 1
+k +c
0 0
Ξ2 = k c ,
− m10 − m10
0
Ξ3 = 1 .
− m0
Hyperbolic Tangent Model by Ghao
· V0 · V0
fmr = A1 tanh A3 x + x + A2 x + x
X0 X0
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 25 / 40
52. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Dahl Friction Model
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 26 / 40
53. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Dahl Friction Model
Dahl Friction Model
·
F = kx (v ) x(t) + kw (v )z(t)
· · ·
z =ρ x− x z .
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 26 / 40
54. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
MR Damper Models
Parametric Models
Dahl Friction Model
Dahl Friction Model
·
F = kx (v ) x(t) + kw (v )z(t)
· · ·
z =ρ x− x z .
Others
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 26 / 40
55. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
Semi Active Control Techniques for MR Dampers
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 27 / 40
56. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
Semi Active Control Techniques for MR Dampers
Model Based Control
Clipped Optimal Control
Control Based on Lyapunov’s
Stability Theory
Bang Bang Control
Sliding Mode Control
Backstepping Control
Quantitative Feedback Theory
H2 and H∞ Control
Bilinear Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 27 / 40
57. Outline Introduction State of the Art My Present Status Future Goals/Milestones
MR Damper Models and Control Techniques
Semi Active Control Techniques for MR Dampers
Model Based Control Soft Computing Based Control
Clipped Optimal Control Neural Networks
Control Based on Lyapunov’s
Stability Theory Fuzzy Logic
Bang Bang Control Genetic Algorithms
Sliding Mode Control
Backstepping Control
Quantitative Feedback Theory
H2 and H∞ Control
Bilinear Control
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 27 / 40
58. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Outline
1 Introduction
2 State of the Art
3 My Present Status
Bilinear System
Damped Linear Oscillator
Biliear Control
L2 Gain and Passivity
Basic System Modified to Control Earthquake Excitation
H∞ Control
4 Future Goals/Milestones
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 28 / 40
59. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Outline
1 Introduction
2 State of the Art
3 My Present Status
4 Future Goals/Milestones
Goals
Timeline
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 37 / 40
60. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Goals
Milestones/Goals
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 38 / 40
61. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Goals
Milestones/Goals
Detailed Modelling Simulations
More Accurate Models
More Complex Models of
System Evaluation
More Complex Models of
Damper
Publications
Controller Design
L2 Gain and Passivity
Other Nonlinear Documentation
Techniques
Stability Proofs
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 38 / 40
62. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Goals
Milestones/Goals
Detailed Modelling Simulations
More Accurate Models
More Complex Models of
System Evaluation
More Complex Models of
Damper
Publications
Controller Design
L2 Gain and Passivity
Other Nonlinear Documentation
Techniques
Stability Proofs
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 38 / 40
63. Outline Introduction State of the Art My Present Status Future Goals/Milestones
Timeline
Time Line
Mughal, U.N. (IOC, UPC) S.A.C. of MRD for Structures July 2011 39 / 40